I am also having this problem.I was first installing orange with pipThen I tried building from sourceThen I found this thread and updated scipy (which meant installing blas and lapack and a Fortran compiler)But now it's still saying"AttributeError: 'module' object has no attribute 'neural'"

I also get the following error with C45 trees... could it be my installation?orange.KernelException: C45Loader: /usr/local/lib/python2.7/dist-packages/Orange/c45.so: cannot open shared object file: No such file or directory

Yes. The Orange.classification.neural was not actually imported when importing Orange itself. Sorry I should have caught this sooner. The problem was I also had orange multitarget add-on which does get imported at the same time as Orange and itself does import neural module. So when I tested the import on my machine it seemed like it worked.

I have fixed the issue and added an explicit import. Can you update and rebuild.